The emphysema problem.
D000368:Aged; D002245:Carbon Dioxide / Q000097:blood; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008168:Lung / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000150:complications; D011086:Polycythemia / Q000150:complications; D011656:Pulmonary Emphysema / Q000150:complications / Q000175:diagnosis*; D013902:Radiography, Thoracic; D012129:Respiratory Function Tests; D012141:Respiratory Tract Infections / Q000628:therapy
D002245:Carbon Dioxide